#include <stdio.h>
#define kuto 950
#define water_m (3.0e-23)
int main(int argc,const char * argv[])
{
    int i;
    float s;
    printf("请输入夸脱数：");
    scanf("%d",&i);
    s=i*kuto/water_m;
    printf("s=%e\n",s);
    return 0;

}